USGS Water-Year Summary 2020
06482610 SPLIT ROCK CREEK AT CORSON, SD
LOCATION - Lat 43°36'59", long 96°33'54" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.26, T.102 N., R.48 W., Minnehaha County, SD, Hydrologic Unit 10170203, on left bank 6 ft downstream from county bridge, 0.3 mi east of Corson, and 3.4 mi upstream from mouth.
DRAINAGE AREA - 482 mi².
- WDR SD-10-1: Drainage area.
PERIOD OF RECORD - October 1965 to September 1997 and October 2001 to current year. February 1951 to September 1965 gage heights and discharge measurements only in files of U.S. Army Corps of Engineers. October 1989 to September 1997 operated as crest-stage partial-record gage.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,305.01 ft above NAVD88. Prior to conversion to NAVD88, datum was published as 1,304.22 ft above (levels by U.S. Army Corps of Engineers). February 1951 to Aug. 15, 1964, nonrecording gage at datum 1,304.37 ft higher. Aug. 15, 1964, to Sept. 3, 1970, nonrecording gage at present site at datum 1,304.22 ft above NGVD29.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 17, 1957, reached a stage of 15.41 ft, discharge, 19,300 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 18,900 ft³/s, May 8, 1993, gage height, 17.58 ft, from floodmark; minimum daily discharge, 0.00 ft³/s, July 20, 1966, no flow at times in some years.